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<h1 class="page-title">
  EJScreen Map Descriptions
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  <p>The below provides basic descriptions for the data included in the mapping layers available through EJScreen. EJScreen data are updated periodically. To see which years of data are in the current version, see <a href="/ejscreen/overview-environmental-indicators-ejscreen">Overview of Environmental Indicators in EJScreen</a> or check the metadata.</p>

<ul type="disc">

<h4>Environmental Justice Indexes</h4>
<ul type="disc"> 
	<li><a href='#ejin-pm25'> Particulate Matter 2.5</a></li>
	<li><a href='#ejin-ozone'> Ozone</a></li>
	<li><a href='#ejin-dslpm'> Diesel Particulate MatteR</a></li>
	<li><a href='#ejin-cancer'> Air Toxics Cancer Risk</a></li>
	<li><a href='#ejin-resp'> Air Toxics Respiratory Hazard Index</a></li>
	<li><a href='#ejin-rseiair'> Toxic Releases to Air</a></li>
	<li><a href='#ejin-ptraf'> Traffic Proximity and Volume</a></li>
	<li><a href='#ejin-ldpnt'> Lead Paint</a></li>
	<li><a href='#ejin-pnpl'> Superfund Proximity</a></li>
	<li><a href='#ejin-prmp'> Risk Management Plan (RMP) Facility Proximity</a></li>
	<li><a href='#ejin-ptsdf'> Hazardous Waste Proximity</a></li>
	<li><a href='#ejin-ust'> Underground Storage Tanks (UST) and Leaking UST (LUST)</a></li>
	<li><a href='#ejin-pwdis'> Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</a></li>
</ul>
<h4>Supplemental Indexes</h4>
<ul type="disc">
<li><a href='#supp-pm25'> Particulate Matter 2.5</a></li>
<li><a href='#supp-ozone'> Ozone</a></li>
<li><a href='#supp-dslpm'> Diesel Particulate MatteR</a></li>
<li><a href='#supp-cancer'> Air Toxics Cancer Risk</a></li>
<li><a href='#supp-resp'> Air Toxics Respiratory Hazard Index</a></li>
<li><a href='#supp-rseiair'> Toxic Releases to Air</a></li>
<li><a href='#supp-ptraf'> Traffic Proximity and Volume</a></li>
<li><a href='#supp-ldpnt'> Lead Paint</a></li>
<li><a href='#supp-pnpl'> Superfund Proximity</a></li>
<li><a href='#supp-prmp'> Risk Management Plan (RMP) Facility Proximity</a></li>
<li><a href='#supp-ptsdf'> Hazardous Waste Proximity</a></li>
<li><a href='#supp-ust'> Underground Storage Tanks (UST) and Leaking UST (LUST)</a></li>
<li><a href='#supp-pwdis'> Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</a></li>
</ul>

<h4>Pollution and Sources</h4>
<ul type="disc">
<li><a href='#poll-pm25'> Particulate Matter 2.5</a></li>
<li><a href='#poll-ozone'> Ozone</a></li>
<li><a href='#poll-dslpm'> Diesel Particulate MatteR</a></li>
<li><a href='#poll-cancer'> Air Toxics Cancer Risk</a></li>
<li><a href='#poll-resp'> Air Toxics Respiratory Hazard Index</a></li>
<li><a href='#poll-rseiair'> Toxic Releases to Air</a></li>
<li><a href='#poll-ptraf'> Traffic Proximity and Volume</a></li>
<li><a href='#poll-ldpnt'> Lead Paint</a></li>
<li><a href='#poll-pnpl'> Superfund Proximity</a></li>
<li><a href='#poll-prmp'> Risk Management Plan (RMP) Facility Proximity</a></li>
<li><a href='#poll-ptsdf'> Hazardous Waste Proximity</a></li>
<li><a href='#poll-ust'> Underground Storage Tanks (UST) and Leaking UST (LUST)</a></li>
<li><a href='#poll-pwdis'> Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</a></li>
</ul>
<h4>Socioeconomic Indicators</h4>
<ul type="disc">
<li><a href='#soci-demogidx_2'> Demographic Index</a></li>
<li><a href='#soci-demogidx_5'> Supplemental Demographic Index</a></li>
<li><a href='#soci-peopcolorpct'> Percent people of color</a></li>
<li><a href='#soci-lowincpct'> Percent low-income</a></li>
<li><a href='#soci-unemppct'> Unemployment</a></li>
<li><a href='#soci-lingisopct'> Percent in limited English speaking</a></li>
<li><a href='#soci-lesshspct'> Percent less than high school education</a></li>
<li><a href='#soci-under5pct'> Percent under age 5</a></li>
<li><a href='#soci-over64pct'> Percent over age 64</a></li>
</ul>


<h2 id='ejin-pm25'>EJ Index-Particulate Matter 2.5</h2>
<p><b>EJ Index-Particulate Matter 2.5(level in air)</b></p>
<ul>
  <li>The Particulate Matter (PM) 2.5 EJ Index combines the PM 2.5 environmental burden indicator with the demographic index (an average of the low-income population and people of color populations) for each block group.  </li>
  <li>The PM 2.5 environmental burden indicator is a measure of potential exposure to inhalable particles that are 2.5 micrometers or smaller. This is measured in terms of annual average concentration in air measured in micrograms per cubic meter. It does not indicate whether a selected area is or is not meeting the national ambient air quality standard for PM 2.5. </li>
  <li>For more details on the PM 2.5 indicator, including why it is important and what you can do moving forward, please visit the <a href="#">PM 2.5 Indicator Overview. </a></li>
</ul>


<hr/>
<h2 id='ejin-ozone'>EJ Index-Ozone</h2>
<ul>
   <li><strong>Ozone</strong><br />Place holder for EJ Index-Ozone</li>
</ul>
<hr/>
<h2 id='ejin-dslpm'>EJ Index-Diesel Particulate Matter</h2>
<ul>
   <li><strong>Diesel Particulate MatteR</strong><br />Place holder for EJ Index- Diesel Particulate MatteR</li>
</ul>
<hr/>
<h2 id='ejin-cancer'>EJ Index-Air Toxics Cancer Risk</h2>
<ul>
   <li><strong>Air Toxics Cancer Risk</strong><br />Place holder for EJ Index- Air Toxics Cancer Risk</li>
</ul>
<hr/>
<h2 id='ejin-resp'>EJ Index-Air Toxics Respiratory Hazard Index</h2>
<ul>
   <li><strong>Air Toxics Respiratory Hazard Index</strong><br />Place holder for EJ Index- Air Toxics Respiratory Hazard Index</li>
</ul>
<hr/>
<h2 id='ejin-rseiair'>EJ Index-Toxic Releases to Air</h2>
<ul>
   <li><strong>Toxic Releases to Air</strong><br />Place holder for EJ Index-Toxic Releases to Air</li>
</ul>
<hr/>
<h2 id='ejin-ptraf'>EJ Index-Traffic Proximity and Volume</h2>
<ul>
   <li><strong>Traffic Proximity and Volume</strong><br />Place holder for EJ Index-Traffic Proximity and Volume</li>
</ul>
<hr/>
<h2 id='ejin-ldpnt'>EJ Index-Lead Paint</h2>
<ul>
   <li><strong>Lead Paint</strong><br />Place holder for EJ Index-Lead Paint</li>
</ul>
<hr/>
<h2 id='ejin-pnpl'>EJ Index-Superfund Proximity</h2>
<ul>
   <li><strong>Superfund Proximity</strong><br />Place holder for EJ Index- Superfund Proximity</li>
</ul>
<hr/>
<h2 id='ejin-prmp'>EJ Index-Risk Management Plan (RMP) Facility Proximity</h2>
<ul>
   <li><strong>Risk Management Plan (RMP) Facility Proximity</strong><br />Place holder for EJ Index-Risk Management Plan (RMP) Facility Proximity</li>
</ul>
<hr/>
<h2 id='ejin-ptsdf'>EJ Index-Hazardous Waste Proximity</h2>
<ul>
   <li><strong>Hazardous Waste Proximity</strong><br />Place holder for EJ Index-Hazardous Waste Proximity</li>
</ul>
<hr/>
<h2 id='ejin-ust'>EJ Index-Underground Storage Tanks (UST) and Leaking UST (LUST)</h2>
<ul>
   <li><strong>Underground Storage Tanks (UST) and Leaking UST (LUST)</strong><br />Place holder for EJ Index-Underground Storage Tanks (UST) and Leaking UST (LUST)</li>
</ul>
<hr/>
<h2 id='ejin-pwdis'>EJ Index-Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</h2>
<ul>
   <li><strong>Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</strong><br />Place holder for EJ Index-Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</li>
</ul>
<hr/>
<h2 id='supp-pm25'>Supplemental Index-Particulate Matter 2.5</h2>
<ul>
   <li><strong>Particulate Matter 2.5</strong><br />Supplemental Index-Place holder for Particulate Matter 2.5</li>
</ul>
<hr/>
<h2 id='supp-ozone'>Supplemental Index-Ozone</h2>
<ul>
   <li><strong>Ozone</strong><br />Place holder for Supplemental Index-Ozone</li>
</ul>
<hr/>
<h2 id='supp-dslpm'>Supplemental Index-Diesel Particulate MatteR</h2>
<ul>
   <li><strong>Diesel Particulate MatteR</strong><br />Place holder for Supplemental Index-Diesel Particulate MatteR</li>
</ul>
<hr/>
<h2 id='supp-cancer'>Supplemental Index-Air Toxics Cancer Risk</h2>
<ul>
   <li><strong>Air Toxics Cancer Risk</strong><br />Place holder for Supplemental Index-Air Toxics Cancer Risk</li>
</ul>
<hr/>
<h2 id='supp-resp'>Supplemental Index-Air Toxics Respiratory Hazard Index</h2>
<ul>
   <li><strong>Air Toxics Respiratory Hazard Index</strong><br />Place holder for Supplemental Index-Air Toxics Respiratory Hazard Index</li>
</ul>
<hr/>
<h2 id='supp-rseiair'>Supplemental Index-Toxic Releases to Air</h2>
<ul>
   <li><strong>Toxic Releases to Air</strong><br />Place holder for Supplemental Index-Toxic Releases to Air</li>
</ul>
<hr/>
<h2 id='supp-ptraf'>Supplemental Index-Traffic Proximity and Volume</h2>
<ul>
   <li><strong>Traffic Proximity and Volume</strong><br />Place holder for Supplemental Index-Traffic Proximity and Volume</li>
</ul>
<hr/>
<h2 id='supp-ldpnt'>Supplemental Index-Lead Paint</h2>
<ul>
   <li><strong>Lead Paint</strong><br />Place holder for Supplemental Index-Lead Paint</li>
</ul>
<hr/>
<h2 id='supp-pnpl'>Supplemental Index-Superfund Proximity</h2>
<ul>
   <li><strong>Superfund Proximity</strong><br />Place holder for Supplemental Index-Superfund Proximity</li>
</ul>
<hr/>
<h2 id='supp-prmp'>Supplemental Index-Risk Management Plan (RMP) Supplemental Index-Facility Proximity</h2>
<ul>
   <li><strong>Risk Management Plan (RMP) Facility Proximity</strong><br />Place holder for Risk Management Plan (RMP) Facility Proximity</li>
</ul>
<hr/>
<h2 id='supp-ptsdf'>Supplemental Index-Hazardous Waste Proximity</h2>
<ul>
   <li><strong>Hazardous Waste Proximity</strong><br />Place holder for Supplemental Index-Hazardous Waste Proximity</li>
</ul>
<hr/>
<h2 id='supp-ust'>Supplemental Index-Underground Storage Tanks (UST) and Leaking UST (LUST)</h2>
<ul>
   <li><strong>Underground Storage Tanks (UST) and Leaking UST (LUST)</strong><br />Place holder for Supplemental Index-Underground Storage Tanks (UST) and Leaking UST (LUST)</li>
</ul>
<hr/>
<h2 id='supp-pwdis'>Supplemental Index-Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</h2>
<ul>
   <li><strong>Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</strong><br />Place holder for Supplemental Index-Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</li>
</ul>
<hr/>
<h2 id='poll-pm25'>Pollution and Sources-Particulate Matter 2.5</h2>
<ul>
   <li><strong>Particulate Matter 2.5</strong><br />Place holder for Particulate Matter 2.5</li>
</ul>
<hr/>
<h2 id='poll-ozone'>Pollution and Sources-Ozone</h2>
<ul>
   <li><strong>Ozone</strong><br />Place holder for Ozone</li>
</ul>
<hr/>
<h2 id='poll-dslpm'>Pollution and Sources-Diesel Particulate MatteR</h2>
<ul>
   <li><strong>Diesel Particulate MatteR</strong><br />Place holder for Diesel Particulate MatteR</li>
</ul>
<hr/>
<h2 id='poll-cancer'>Pollution and Sources-Air Toxics Cancer Risk</h2>
<ul>
   <li><strong>Air Toxics Cancer Risk</strong><br />Place holder for Air Toxics Cancer Risk</li>
</ul>
<hr/>
<h2 id='poll-resp'>Pollution and Sources-Air Toxics Respiratory Hazard Index</h2>
<ul>
   <li><strong>Air Toxics Respiratory Hazard Index</strong><br />Place holder for Air Toxics Respiratory Hazard Index</li>
</ul>
<hr/>
<h2 id='poll-rseiair'>Pollution and Sources-Toxic Releases to Air</h2>
<ul>
   <li><strong>Toxic Releases to Air</strong><br />Place holder for Toxic Releases to Air</li>
</ul>
<hr/>
<h2 id='poll-ptraf'>Pollution and Sources-Traffic Proximity and Volume</h2>
<ul>
   <li><strong>Traffic Proximity and Volume</strong><br />Place holder for Traffic Proximity and Volume</li>
</ul>
<hr/>
<h2 id='poll-ldpnt'>Pollution and Sources-Lead Paint</h2>
<ul>
   <li><strong>Lead Paint</strong><br />Place holder for Lead Paint</li>
</ul>
<hr/>
<h2 id='poll-pnpl'>Pollution and Sources-Superfund Proximity</h2>
<ul>
   <li><strong>Superfund Proximity</strong><br />Place holder for Superfund Proximity</li>
</ul>
<hr/>
<h2 id='poll-prmp'>Pollution and Sources-Risk Management Plan (RMP) Facility Proximity</h2>
<ul>
   <li><strong>Risk Management Plan (RMP) Facility Proximity</strong><br />Place holder for Risk Management Plan (RMP) Facility Proximity</li>
</ul>
<hr/>
<h2 id='poll-ptsdf'>Pollution and Sources-Hazardous Waste Proximity</h2>
<ul>
   <li><strong>Hazardous Waste Proximity</strong><br />Place holder for Hazardous Waste Proximity</li>
</ul>
<hr/>
<h2 id='poll-ust'>Pollution and Sources-Underground Storage Tanks (UST) and Leaking UST (LUST)</h2>
<ul>
   <li><strong>Underground Storage Tanks (UST) and Leaking UST (LUST)</strong><br />Place holder for Underground Storage Tanks (UST) and Leaking UST (LUST)</li>
</ul>
<hr/>
<h2 id='poll-pwdis'>Pollution and Sources-Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</h2>
<ul>
   <li><strong>Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</strong><br />Place holder for Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</li>
</ul>
<hr/>
<h2 id='soci-demogidx_2'>Socioeconomic Indicators-Demographic Index</h2>
<ul>
   <li><strong>Demographic Index</strong><br />Place holder for Demographic Index</li>
</ul>
<hr/>
<h2 id='soci-demogidx_5'>Socioeconomic Indicators-Supplemental Demographic Index</h2>
<ul>
   <li><strong>Supplemental Demographic Index</strong><br />Place holder for Supplemental Demographic Index</li>
</ul>
<hr/>
<h2 id='soci-peopcolorpct'>Socioeconomic Indicators-Percent people of color</h2>
<ul>
   <li><strong>Percent people of color</strong><br />Place holder for Percent people of color</li>
</ul>
<hr/>
<h2 id='soci-lowincpct'>Socioeconomic Indicators-Percent low-income</h2>
<ul>
   <li><strong>Percent low-income</strong><br />Place holder for Percent low-income</li>
</ul>
<hr/>
<h2 id='soci-unemppct'>Socioeconomic Indicators-Unemployment</h2>
<ul>
   <li><strong>Unemployment</strong><br />Place holder for Unemployment</li>
</ul>
<hr/>
<h2 id='soci-lingisopct'>Socioeconomic Indicators-Percent in limited English speaking</h2>
<ul>
   <li><strong>Percent in limited English speaking</strong><br />Place holder for Percent in limited English speaking</li>
</ul>
<hr/>
<h2 id='soci-lesshspct'>Socioeconomic Indicators-Percent less than high school education</h2>
<ul>
   <li><strong>Percent less than high school education</strong><br />Place holder for Percent less than high school education</li>
</ul>
<hr/>
<h2 id='soci-under5pct'>Socioeconomic Indicators-Percent under age 5</h2>
<ul>
   <li><strong>Percent under age 5</strong><br />Place holder for Percent under age 5</li>
</ul>
<hr/>
<h2 id='soci-over64pct'>Socioeconomic Indicators-Percent over age 64</h2>
<ul>
   <li><strong>Percent over age 64</strong><br />Place holder for Percent over age 64</li>
</ul>
<hr/>



	
<hr /><h2 id="ejin">EJ Indexes - Particulate Matter 2.5</h2>

<ul><li><strong>Particulate Matter 2.5</strong><br />
	Place holder for EJ Index for Particulate Matter 2.3</li>
</ul><hr /><h2 id="supp">Supplemental Indexes</h2>

<ul><li><strong>Supplemental Index</strong><br />
	There are thirteen supplemental indexes in EJScreen reflecting the 13 environmental indicators, combined with socioeconomic information. The supplemental index highlights block groups with the highest intersection of five socioeconomic factors and a given environmental indicator. To calculate a single supplemental index for one block group, EJScreen multiplies the environmental indicator by socioeconomic information. This socioeconomic information includes percent low-income, percent linguistically isolated, percent less than high school education, percent unemployed, and low life expectancy (as the supplemental demographic index). This is the formula for the index:<br />
	Supplemental Index = (Environmental Indicator Percentile for Block Group) X (Supplemental Demographic Index for Block Group)</li>
</ul><hr /><h2 id="poll">Pollution and Sources</h2>

<ul><li><strong>Particulate Matter 2.5 (level in air)</strong><br />
	Particulate matter (PM2.5) levels in air, micrograms per cubic meter (µg/m3) annual average.<br /><em>Source:</em> EPA Office of Air and Radiation</li>
	<li><strong>Ozone (level in air)</strong><br />
	Annual average of top ten daily maximum 8-hour air concentrations in parts per billion.<br /><em>Source: </em>EPA Office of Air and Radiation</li>
	<li><strong>Diesel Particulate Matter (level in air)</strong><br />
	Diesel particulate matter level in air in micrograms per cubic meter (µg/m3).<br /><em>Source:</em> <a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="1189634e-3c43-4916-bb38-a855cd4ffe23" href="/AirToxScreen">EPA Air Toxics Screening Assessment</a></li>
	<li><strong>Air Toxics Cancer Risk</strong><br />
	Lifetime cancer risk from inhalation of air toxics, as risk per lifetime per million people.<br /><em>Source:</em> <a href="/AirToxScreen">EPA Air Toxics Screening Assessment</a></li>
	<li><strong>Air Toxics Respiratory Hazard Index</strong><br />
	Air toxics respiratory hazard index (the sum of hazard indices for those air toxics with reference concentrations based on respiratory endpoints, where each hazard index is the ratio of exposure concentration in the air to the health-based reference concentration set by EPA).<br /><em>Source:</em> <a href="/AirToxScreen">EPA Air Toxics Screening Assessment</a></li>
	<li><strong>Toxic Releases to Air</strong><br />
	RSEI modeled toxicity-weighted concentrations in air of TRI listed chemicals.<br /><em>Source: </em><a href="/rsei/rsei-geographic-microdata-rsei-gm">RSEI Geographic Microdata</a></li>
	<li><strong>Traffic Proximity and Volume</strong><br />
	Count of vehicles per day (average annual daily traffic) at major roads within 500 meters (or nearest one beyond 500 m), divided by distance in meters. Calculated from U.S. Department of Transportation National Transportation Atlas Database, Highway Performance Monitoring System.</li>
	<li><strong>Lead Paint (% pre-1960 housing)</strong><br />
	Percent of housing units built before 1960, as indicator of potential exposure to lead paint. Calculated from the Census Bureau's American Community Survey 5-year summary estimates.</li>
	<li><strong>Superfund Proximity</strong><br />
	Count of proposed and listed NPL sites within 5 km (or nearest one beyond 5 km), each divided by distance in km. Count excludes deleted sites.<br />
	Source: Calculated from EPA CERCLIS database.</li>
	<li><strong>Risk Management Plan (RMP) Facility Proximity</strong><br />
	Count of RMP (potential chemical accident management plan) facilities within 5 km (or nearest one beyond 5 km), each divided by distance in km. Calculated from EPA RMP database.</li>
	<li><strong>Hazardous Waste Proximity</strong><br />
	Count of hazardous waste management facilities (TSDFs and LQGs) within 5 km (or nearest one beyond 5 km), each divided by distance in km. Calculated from EPA RCRAInfo database.</li>
	<li><strong>Underground Storage Tanks (UST) and Leaking UST (LUST)</strong><br />
	Count of LUSTs (multiplied by a factor of 7.7) and the number of USTs within a 1,500-foot buffered block group. Calculated from EPA UST Finder.</li>
	<li><strong>Wastewater Dischargers Indicator (Stream Proximity and Toxic Concentration)</strong><br />
	RSEI modeled Toxic Concentrations at stream segments within 500 meters, divided by distance in kilometers (km). Calculated from RSEI modeled toxic concentrations to stream reach segments.</li>
</ul><hr /><h2 id="soci">Socioeconomic Indicators</h2>

<p>The source of all the socioeconomic indicators is the Census Bureau's American Community Survey 5-year summary estimates.</p>

<ul><li><strong>Percent people of color </strong><br />
	The percent of individuals in a block group who list their racial status as a race other than white alone and/or list their ethnicity as Hispanic or Latino. That is, all people other than non-Hispanic white-alone individuals. The word "alone" in this case indicates that the person is of a single race, not multiracial.</li>
	<li><strong>Percent low-income</strong><br />
	Percent of individuals whose ratio of household income to poverty level in the past 12 months was less than 2 (as a fraction of individuals for whom ratio was determined).</li>
	<li><strong>Unemployment</strong><br />
	All those who did not have a job at all during the reporting period, made at least one specific active effort to find a job during the prior 4 weeks, and were available for work (unless temporarily ill).</li>
	<li><strong>Percent in limited English speaking</strong><br />
	Percent of households in which no one age 14 and over speaks English "very well" or speaks English only (as a fraction of households).</li>
	<li><strong>Percent less than high school education</strong><br />
	Percent of individuals age 25 and over with less than high school degree.</li>
	<li><strong>Percent under age 5</strong><br />
	Percent of individuals under age 5 as a fraction of population.</li>
	<li><strong>Percent over age 64</strong><br />
	Percent of individuals over age 64 as a fraction of the population.</li>
	<li><strong>Demographic Index</strong><br />
	The demographic index in EJScreen is a combination of percent low-income and percent minority, the two socioeconomic factors that were explicitly named in Executive Order 12898 on Environmental Justice. For each Census block group, these two numbers are simply averaged together. The formula is as follows: demographic index = (% people of color + % low-income) / 2.</li>
	<li><strong>Supplemental Demographic Index</strong><br />
	The supplemental demographic index in EJScreen is a combination of five socioeconomic factors averaged together for each Census block group. The supplemental demographic index can provide an additional perspective on potential community vulnerability and may be more relevant for use in certain situations. The formula is as follows: supplemental demographic index = (% low-income + % unemployed + % less than high school education + % limited English speaking + low life expectancy) / 5. For block groups where low life expectancy data is missing, the formula will average the other four factors. </li>
</ul><hr /><h2 id="heal">Health Disparities</h2>

<h4><strong>Low Life Expectancy</strong></h4>

<p>Average life expectancy data developed as a collaboration between NCHS, the National Association for Public Health Statistics and Information Systems, and the Robert Wood Johnson Foundation. This data is available at the tract level; the same tract value is then assigned to all sub block groups.<br /><em>Source:</em> <a href="https://www.cdc.gov/nchs/nvss/usaleep/usaleep.html">U.S. Small-area Life Expectancy Estimates Project (USALEEP)</a></p>

<h4><strong>Heart Disease</strong></h4>

<p>Heart disease prevalence among adults aged 18 years or older. The term "heart disease" refers to several types of heart conditions. This data is available at the tract level; the same tract value is then assigned to all sub block groups.<br /><em>Source:</em> <a href="https://www.cdc.gov/places/index.html">CDC Places Data</a></p>

<h4><strong>Asthma</strong></h4>

<p>Asthma prevalence among adults aged 18 or older. This data is available at the tract level; the same tract value is then assigned to all sub block groups.<br /><em>Source:</em> <a href="https://www.cdc.gov/places/index.html">CDC Places Data</a></p>

<h4><strong>Cancer</strong></h4>

<p>Cancer (excluding skin cancer) prevalence among adults aged 18 or older. This data is available at the Census tract level; the same tract value is then assigned to all sub block groups.<br /><em>Source: </em><a href="https://www.cdc.gov/places/index.html">CDC Places Data</a></p>

<h4><strong>Persons with Disabilities</strong></h4>

<p>Percent of all persons with disabilities. <span><span><span><span>Considers six disability types: hearing difficulty, vision difficulty, cognitive difficulty, ambulatory difficulty, self-care difficulty, and independent living difficulty.  Respondents who report any one of the six disability types are considered to have a disability. For more information on each disability type visit: <a href="https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.census.gov%2Ftopics%2Fhealth%2Fdisability%2Fguidance%2Fdata-collection-acs.html&amp;data=05%7C01%7CLung.Tai%40epa.gov%7Cf8c7257d4cc94a4ac21608db8c401393%7C88b378b367484867acf976aacbeca6a7%7C0%7C0%7C638257979055745666%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=%2BSXz6g%2Fo0CbSdGmdGVU71V2ebCWTMDN2g0eOXk6OJAg%3D&amp;reserved=0">https://www.census.gov/topics/health/disability/guidance/data-collection-acs.html</a></span></span></span></span></p>

<p>This data is derived from Census ACS data at the tract level. Block group values are calculated by multiplying the tract value by the block population weight. The weights are derived from the same Census source used by the EJScreen buffer reports and analysis.<br /><em>Source:</em> <a href="https://www.census.gov/programs-surveys/acs/data/data-via-ftp.html">Download ACS Data</a></p>

<hr /><h2 id="clim">Climate Change</h2>

<h4><strong>Estimated 100-year floodplains</strong></h4>

<p>This map depicts the estimated 100-year floodplains for the Conterminous US for 2016. These data can be used to look for socially and economically vulnerable communities located within the estimated 100-year floodplains. <br /><em>Source</em>: <a href="https://enviroatlas.epa.gov/enviroatlas/DataFactSheets/pdf/Supplemental/EstimatedFloodplains.pdf">Enviroatlas</a><br /><em>Spatial Metadata</em>: <a href="https://enviroatlas.epa.gov/arcgis/rest/services/Supplemental/Estimated_floodplain_CONUS_WM/ImageServer">Enviroatlas</a></p>

<h4><strong>Sea Level Rise (NOAA)</strong></h4>

<p>This dataset depicts land at risk of permanent flooding when sea level rises. There are six map layers showing the area inundated at one, two, three, four, five and six feet of sea level rise. Over the next 30 years, scientists estimate a one to three-foot rise along most of the U.S. coastline. These data can be used to look for areas of potential permanent inundation based on chosen sea level rise estimates (i.e., 1 to 6 feet) in relation to locations of social and economic vulnerability.<br /><em>Source</em>: <a href="https://www.arcgis.com/home/webmap/viewer.html?featurecollection=https%3A%2F%2Fwww.coast.noaa.gov%3A443%2Farcgis%2Frest%2Fservices%2Fdc_slr%2Fslr_1ft%2FMapServer%3Ff%3Djson%26option%3Dfootprints&amp;supportsProjection=true&amp;supportsJSONP=true">National Oceanic and Atmospheric Administration</a><br /><em>Spatial Metadata</em>: <a href="https://www.coast.noaa.gov/arcgis/rest/services/dc_slr/slr_1ft/MapServer">NOAA Office for Coastal Management</a></p>

<h4><strong>Wildfire Risk</strong></h4>

<p>The First Street Foundation-Wildfire Model (FSF-WFM) is a 30 meter resolution model representing the wildfire exposure for any specific location in the contiguous US, today and with the future climate change. The risk of wildfire is derived from a series of inputs associated with fire fuels, weather, human influence, and fire movement. Bringing all of these inputs together, at a national scale, in a high-resolution, climate-adjusted model represents a first-of-its-kind property-level wildfire risk model. In the development of the model, U.S. Federal Government open data are used for the foundational topography, fuels, weather, climate, and historical disturbances information, and additional data were added from a variety of state and local wildfire and land management sources to facilitate a both high resolution and future-facing (estimates both for today and for 30 years ahead) product. <br /><em>Source</em>: <a href="https://firststreet.org/">First Street Foundation</a></p>

<h4><strong>Flood Risk</strong></h4>

<p>The First Street Foundation Flood Model is a nationwide probabilistic flood model that shows the risk of flooding at any location in all 50 states and Puerto Rico due to rainfall (pluvial), riverine flooding (fluvial), and coastal surge flooding. While other hydraulic and hydrologic models show refined risks of flooding in certain areas, this model provides complete coverage across the United States at 3-meter resolution. The First Street Foundation Flood Model provides a consistent and unified methodology across the entire country with continuous outputs. This extends into areas that have no previous flood modeling and even areas that do not have recorded hydrologic data. As a result, there is increased visibility into new regions of the entire country. <br /><em>Source</em>: <a href="https://firststreet.org/">First Street Foundation</a></p>

<hr /><h2 id="crit">Critical Service Gaps</h2>

<h4><strong>Broadband Gaps</strong></h4>

<p>Areas with the lowest rate of households with a broadband internet subscription.<br /><em>Source:</em> The Census Bureau's American Community Survey 5-year summary estimates.</p>

<h4><strong>Lack of Health Insurance</strong></h4>

<p>Percent of all persons without Health Insurance Coverage.<br /><em>Source: </em><a href="https://www.census.gov/programs-surveys/acs/data/data-via-ftp.html">Download ACS Data</a></p>

<h4><strong>Housing Burden</strong></h4>

<p>This dataset contains census tract level percentiles for housing cost, which is the share of households that are both earning less than 80% of Housing and Urban Development’s Area Median Family Income and are spending more than 30% of their income on housing costs. The housing cost percentiles were adopted as Housing Burden for EJScreen.<br /><em>Source: </em><a href="https://www.huduser.gov/portal/datasets/cp.html">U.S. Department of Housing and Urban Development</a></p>

<h4><strong>Transportation Access</strong></h4>

<p>The Average of Transportation Indicator uses an average of four transportation-related indicator percentiles, including Transportation Cost Burden, National Walkability Index, Percentage of Households with No Vehicle Available, and Mean Commute Time to Work. It was renamed to Transportation Access for EJScreen. <br /><em>Source: </em><a href="https://www.transportation.gov/priorities/equity/justice40/transportation-insecurity-analysis-tool">The Department of Transportation's Transportation Disadvantaged Census Tracts</a></p>

<h4><strong>Food Desert</strong></h4>

<p>Low income and low access tract measured at 1 mile for urban areas and 10 miles for rural areas. This data is available at the tract level.<br /><em>Source: </em><a href="https://www.ers.usda.gov/data-products/food-access-research-atlas/download-the-data/">USDA</a></p>

<hr /><h2 id="addi">Additional Demographics </h2>

<p>Demographic information is available to add to the EJScreen map under the "Additional Demographics" button. You may click on the associated button to see metadata for that data layer. Please see the Census Bureau website for more explanations regarding the annual American Community Survey (ACS) estimates.</p>

<hr /><h2 id="thre">Threshold Maps</h2>

<p>The threshold maps are a compilation of the various EJ indexes or the various supplemental indexes on a single map. The threshold map widget allows EJScreen users to look across all twelve indexes at once, providing a cumulative outlook on vulnerable populations facing higher pollution burdens. Users select a percentile range, for example the 80th to 100th percentile, and the tool then maps places where one or more of the indexes is within that range. The tool also allows users to select the number of indexes within the user-defined range or to select specific indicators of interest. Threshold maps are available for both the EJ indexes and the new supplemental indexes and are available for comparison at the national and state level.  </p>

<hr /><h2 id="plac">Places Layers</h2>

<h3 id="sites-reporting-to-epa">EPA Regulated Facilities </h3>

<p>The below includes information EPA collects through various databases about facilities or sites subject to environmental regulation.</p>

<h4><strong>Superfund</strong></h4>

<p>The Superfund Enterprise Management System (SEMS) provides information regarding sites under the <a href="/laws-regulations/summary-comprehensive-environmental-response-compensation-and-liability-act">Comprehensive Environmental Response, Compensation, and Liability Act</a> -- otherwise known as CERCLA or Superfund. CERCLA provides a Federal "Superfund" to locate, investigate, and clean up uncontrolled or abandoned hazardous-waste sites as well as accidents, spills, and other emergency releases of pollutants and contaminants into the environment. The National Priorities List (NPL) is the list of national priorities among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States and its territories.<br /><em>Source</em>: <a href="/enviro/pcs-icis-overview">EPA's Envirofacts</a></p>

<h4><strong>Water Dischargers (NPDES)</strong></h4>

<p>As authorized by the Clean Water Act, the <a href="/npdes">National Pollutant Discharge Elimination System (NPDES) </a>permit program controls water pollution by regulating sources, such as municipal and industrial wastewater treatment facilities, that discharge pollutants into waters of the United States. EPA tracks water discharge permits through the Permit Compliance System (PCS) and Integrated Compliance Information System (ICIS) databases, which includes information on when a permit was issued and when it expires, how much the company is permitted to discharge, and the actual monitoring data showing what the company has discharged.<br /><em>Source</em>: <a href="/enviro/pcs-icis-overview">EPA's Envirofacts</a></p>

<h4><strong>Air Pollution (ICIS-AIR)</strong></h4>

<p>The air pollution data (<a href="/enviro/icis-air-overview">ICIS-AIR</a>) contains compliance and permit data for stationary sources of air pollution (such as electric power plants, steel mills, factories, and universities) regulated by EPA, state and local air pollution agencies. The information in ICIS-AIR is used by the states to prepare State Implementation Plans (SIPs) and to track the compliance status of point sources with various regulatory programs under Clean Air Act.<br /><em>Source</em>: <a href="/enviro/icis-air-overview">EPA's Envirofacts</a></p>

<h4><strong>Hazardous Waste (TSDF and LQGs)</strong></h4>

<p>Hazardous waste information contained in the Resource Conservation and Recovery Act Information (RCRAInfo) includes an inventory on all generators, transporters, treaters, storers, and disposers of hazardous waste that are required to provide information about their activities.<br />
Source: <a href="/enviro/rcrainfo-overview">EPA's Envirofacts</a></p>

<h4><strong>Brownfields (ACRES)</strong></h4>

<p>The <a href="/brownfields/grant-recipient-reporting">Assessment, Cleanup and Redevelopment Exchange System (ACRES)</a> captures grantee reported data on environmental activities and accomplishments (assessment, cleanup and redevelopment), funding, job training, and details on cooperative partners and leveraging efforts for the <a href="/brownfields">Brownfields Program</a>. The information in ACRES is provided at the property and grant level.<br /><em>Source</em>: <a href="/brownfields">EPA's Envirofacts</a></p>

<h4><strong>Toxics Release Inventory</strong></h4>

<p>As authorized under the <a href="/toxics-release-inventory-tri-program/tri-laws-and-regulatory-activities">Emergency Planning and Community Right-to-Know Act</a> (EPCRA) and the <a href="/laws-regulations/summary-pollution-prevention-act">Pollution Prevention Act</a> (PPA), the <a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="d1079c37-c758-4fa8-ae00-9c19c4f449d8" href="/toxics-release-inventory-tri-program">Toxics Release Inventory</a> (TRI) tracks the management of certain toxic chemicals that may pose a threat to human health and the environment. U.S. facilities in different industry sectors must report annually how much of each chemical is released to the environment and/or managed through recycling, energy recovery and treatment. <br />
The map shows point locations for facilities that submitted TRI reports to EPA during the most recent reporting year. Points are relatively sized based on total quantities reported as released. <br /><em>Source:</em> <a href="/enviro/tri-overview">EPA's Envirofacts</a> and <a href="/frs">Facility Registry Service (FRS)</a><br />
Spatial metadata: <a href="https://epa.maps.arcgis.com/home/webmap/viewer.html?layers=76e9a521bc4245388c0d734be62bfb51&amp;useExisting=1">TRI</a></p>

<h4><strong>Chemical Data Reporting (CDR)</strong></h4>

<p>The <a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="6cfcf85f-3c41-469a-950f-8b9685b2ddc8" href="/laws-regulations/summary-toxic-substances-control-act">Toxic Substances Control Act</a> (TSCA) grants EPA broad authority to issue regulations designed to gather health/safety and exposure information on, require testing of, and control exposure to chemical substances and mixtures. Under Section 8(a) of TSCA, the <a data-entity-substitution="canonical" data-entity-type="node" data-entity-uuid="705dae49-ab0f-45b2-9834-2fbf897f9a42" href="/chemical-data-reporting">Chemical Data Reporting</a> (CDR) rule requires manufacturers (including importers) to report information every four years on the production and use of chemicals in commerce. This map shows point locations for sites that submitted CDR reports to EPA during the most recent reporting cycle (2020). <br /><em>Source</em>: <a href="/chemical-data-reporting/access-cdr-data">Access CDR</a><br />
Spatial Metadata: <a href="https://epa.maps.arcgis.com/home/webmap/viewer.html?layers=4d1f03813be8438abe0b5222437fcdcc&amp;useExisting=1">CDR</a></p>

<h3 id="echo">Facilities Compliance Status</h3>

<p>The map layer uses the Enforcement and Compliance History Online (ECHO) standard facility symbology to illustrate the programs each facility is regulated under, whether they are in noncompliance, and how long it has been since the last inspection. Users can choose to view all facilities or tailor the view to facilities regulated under the Clean Air Act, Clean Water Act, or Resource Conservation and Recovery Act. <em>Source:</em> This includes data about EPA-regulated facilities from the <a href="https://echo.epa.gov/facilities/facility-search?mediaSelected=all">All Media Programs facility search</a> and the <a href="https://echo.epa.gov/tools/data-downloads#exporter">ECHO Exporter</a>.</p>

<h3 id="schools">Schools</h3>

<p>The National Center for Education Statistics’ (NCES) Education Demographic and Geographic Estimate (EDGE) program develops annually updated point locations (latitude and longitude) for public elementary and secondary schools included in the NCES Common Core of Data. The NCES EDGE program collaborates with the U.S. Census Bureau’s Education Demographic, Geographic, and Economic Statistics (EDGE) Branch to develop point locations for schools and school district administrative offices based on these addresses. The point locations in this data layer were developed from the 2021-2022 CCD collection.<br />
For more information about NCES school point data, see: <a href="https://nces.ed.gov/programs/edge/Geographic/SchoolLocations">National Center for Education Statistics (NCES)</a></p>

<h3 id="places-of-worship"><strong>Places of Worship</strong></h3>

<p>Point locations for buildings used for religious worship (e.g., chapel, mosque, synagogue, tabernacle, or temple).<br /><em>Source:</em> <a href="https://www.usgs.gov/core-science-systems/ngp/board-on-geographic-names">U.S. Geological Survey Geographic Names Information System (GNIS)</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=2&amp;service=NEPAssist/Places">Worship Places</a></p>

<h3 id="hospitals"><strong>Hospitals</strong></h3>

<p>Point locations for buildings where the sick or injured may receive medical or surgical attention (e.g., infirmary, clinic).<br /><em>Source: </em><a href="https://www.usgs.gov/core-science-systems/ngp/board-on-geographic-names">U.S. Geological Survey Geographic Names Information System (GNIS)</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=3&amp;service=NEPAssist/Places">Hospitals</a></p>

<h3 id="parks">Parks</h3>

<p>An ArcGIS WebService representing fine level manager or administrative agency name standardized for the Nation (USFS, BLM, State Fish and Wildlife, State Parks and Rec, City, NGO, etc). This map is based on the PAD-US 3.0 Combined Proclamation, Marine, Fee, Designation, Easement feature class. DOD and Tribal areas shown with 50% transparency. Use for categorization by manager name, with detailed federal managers and generic state/local/other managers.<br />
For more information about PAD-US: <a href="https://doi.org/10.5066/P9Q9LQ4B">Protected Areas Database of the United States (PAD-US) 3.0</a><br /><em>Source: </em><a href="https://www.usgs.gov/programs/gap-analysis-project/science/pad-us-data-download">PAD-US Data Download</a></p>

<h3 id="other-environmental-data">Other Environmental Data</h3>

<h4><strong>RSEI Score</strong></h4>

<p>A RSEI Score is a unitless value that accounts for the size of the chemical release, the fate and transport of the chemical through the environment, the size and location of the exposed population, and the chemical's toxicity. A RSEI Score is calculated as toxicity weight multiplied by the exposed population multiplied by the estimated dose. <em>RSEI Scores are only meaningful in comparison to other RSEI Scores.</em><br /><em>Source:</em> EPA's RSEI</p>

<h3 id="nonattainment-areas">NonAttainment Areas</h3>

<p>If the air quality in a geographic area meets or is cleaner than the National Ambient Air Quality Standard (NAAQS), it is called an attainment area; areas that don't meet the national standard are called nonattainment areas.  In some cases, EPA is not able to determine an area's status after evaluating the available information and those areas are designated "unclassifiable." These are areas that do not meet (or that contributes to ambient air quality in a nearby area that does not meet) the national primary or secondary ambient air quality standard for a NAAQS.</p>

<p><strong>PM10 (1987 standard)</strong><br /><em>Description:</em> PM10 (1987 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/8">PM10 (1987 standard)</a><br /><strong>PM2.5 Annual (2012 standard)</strong><br /><em>Description:</em> PM2.5 Annual (2012 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/7">PM2.5 Annual (2012 standard)</a><br /><strong>PM2.5 Annual (1997 standard)</strong><br /><em>Description:</em> PM2.5 Annual (1997 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/6">PM2.5 Annual (1997 standard)</a><br /><strong>PM2.5 24hr (2006 standard)</strong><br /><em>Description:</em> PM2.5 24hr (2006 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/5">PM2.5 24hr (2006 standard)</a><br /><strong>SO2 1-hr (2010 standard)</strong><br /><em>Description:</em> SO2 1-hr (2010 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/4">SO2 1-hr (2010 standard)</a><br /><strong>Lead (2008 standard)</strong><br /><em>Description:</em> Lead (2008 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/3">Lead (2008 standard)</a><br /><strong>Ozone 8-hr (2008 standard)</strong><br /><em>Description:</em> Ozone 8-hr (2008 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/1">Ozone 8-hr (2008 standard)</a><br /><strong>Ozone 8-hr (1997 standard)</strong><br /><em>Description:</em> Ozone 8-hr (1997 standard)<br /><em>Source and Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OAR_OAQPS/NonattainmentAreas/MapServer/0">Ozone 8-hr (1997 standard)</a></p>

<h3 id="water-features">Water Features</h3>

<h4><strong>Impaired Water Points</strong></h4>

<p>The Impaired Water Points layer includes points that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These water points are on the CWA 303(d) list and are required to develop a total maximum daily load (TMDL). This set of water points are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).<br /><em>Source:</em> <a href="/waterdata/get-data-access-public-attains-data#AttainsGeo">EPA Office of Water ATTAINS Geospatial Data</a><br /><em>Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OW/ATTAINS_Assessment/MapServer/0">ATTAINS Assessment Areas</a></p>

<h4><strong>Impaired Streams</strong></h4>

<p>The Impaired Streams layer includes streams that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These streams are on the CWA 303(d) list and are required to develop a total maximum daily load (TMDL). These stream segments are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).<br /><em>Source:</em> <a href="/waterdata/get-data-access-public-attains-data#AttainsGeo">EPA Office of Water ATTAINS Geospatial Data</a><br /><em>Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OW/ATTAINS_Assessment/MapServer/1">ATTAINS Assessment Lines</a></p>

<h4><strong>Impaired Water Bodies</strong></h4>

<p>The Impaired Water Bodies layer includes bodies of water that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These water bodies are on the CWA 303(d) list and are required to develop a total maximum daily load (TMDL). This set of water areas are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).<br /><em>Source:</em> <a href="/waterdata/get-data-access-public-attains-data#AttainsGeo">EPA Office of Water ATTAINS Geospatial Data</a><br /><em>Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OW/ATTAINS_Assessment/MapServer/2">ATTAINS Assessment Areas</a></p>

<h4><strong>Impaired Catchment</strong></h4>

<p>The Impaired Catchment layer includes catchment assessment units that are too polluted or otherwise degraded to meet the water quality standards set by states, territories, or authorized tribes. These water bodies are on the CWA 303(d) list and are required to develop a total maximum daily load (TMDL). This set of water areas are provided by the Assessment, Total Maximum Daily Load Tracking and Implementation System (ATTAINS).<br /><em>Source:</em> <a href="/waterdata/get-data-access-public-attains-data#AttainsGeo">EPA Office of Water ATTAINS Geospatial Data</a><br /><em>Spatial Metadata:</em> <a href="https://gispub.epa.gov/arcgis/rest/services/OW/ATTAINS_Assessment/MapServer/3">ATTAINS Assessment Areas</a></p>

<h4><strong>Streams</strong></h4>

<p>The Streams layer includes linear surface water features throughout the United States. The streams layer is based on the National Hydrography Dataset (NHD).<br /><em>Source:</em> <a href="/waterdata/nhdplus-national-hydrography-dataset-plus">EPA Office of Water</a><br /><em>Spatial Metadata:</em> <a href="https://data.usgs.gov/datacatalog/metadata/USGS.ecd2ad5e-faa2-4291-bcdb-441b7113ea41.xml">Streams</a></p>

<h4><strong>Water Bodies</strong></h4>

<p>The Water Bodies layer includes area surface features such as ponds, lakes and wide rivers. The water bodies layer is from U.S. Census Bureau TIGER/Line data.<br /><em>Source:</em> <a href="https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-geodatabase-file.2019.html">U.S. Census Bureau Areal Hydrography</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=3&amp;service=NEPAssist/Water">Water Bodies</a></p>

<h4><strong>Sole Source Aquifers</strong></h4>

<p>The <a href="/dwssa">Sole Source Aquifer</a> layer includes information on the sole source aquifers (SSA) designated by EPA under section 1424(e) of the Safe Drinking Water Act of 1974. SSA's supply at least 50 percent of the drinking water consumed in the area overlying the aquifer. These areas may have no alternative drinking water source(s) that could physically, legally and economically supply all those who depend on the aquifer for drinking water.<br /><em>Source: </em><a href="https://epa.maps.arcgis.com/apps/webappviewer/index.html?id=9ebb047ba3ec41ada1877155fe31356b">SSA Locations</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=3&amp;service=NEPAssist/Water">Sole Source Aquifers</a></p>

<h3 id="tribal-lands-and-indigenous-areas">Tribal Lands and Indigenous Areas</h3>

<p>EPA makes no claims regarding the accuracy or precision of data concerning Indian country locations or boundaries. EPA has simply attempted to collect certain readily available information relating to Indian country locations.</p>

<p>Please note that the EPA makes no claims regarding either the spatial accuracy or precision of these data as associated boundaries and coordinate locations were delineated by the U.S. federal agencies annotated in this metadata record. Data users are encouraged to carefully reference the metadata provided by these federal agencies before using this service. These data are not better than the sources from which they were derived, and both scale and accuracy may vary across the dataset. These data are neither legal documents nor land surveys and must not be used as such. This information cannot be relied upon to create any rights, substantive or procedural, enforceable by any party in litigation with the United States or third parties. EPA reserves the right to change this dataset at any time without public notice.</p>

<h4>Tribal Lands</h4>

<p>This layer represents locations of American Indian Tribal lands in the lower 48 states and Alaska. The areas include all lands associated with Federally recognized tribal entities--Federally recognized Reservations, Off-Reservation Trust Lands, and Census Oklahoma Tribal Statistical Areas. EPA makes no claims regarding the accuracy or precision of data concerning Indian country locations or boundaries. EPA has simply attempted to collect certain readily available information relating to Indian country locations.<br /><em>Source:</em> <a href="https://geopub.epa.gov/arcgis/rest/services/EMEF/tribal/MapServer">EPA ArcGIS for EMEF/tribal</a></p>

<h4>Alaska Native Allotments</h4>

<p>Bureau of Land Management-defined locations based on land survey records associated with the Public Land Survey System (PLSS) and <a href="/geospatial/guidance-using-tribal-boundaries-areas-and-names-resources">associated legislation in Alaska</a>. <br /><em>Source</em>: <a href="https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/BND___Alaska_Native_Allotments/FeatureServer">EPA ArcGIS for Alaska Native Allotments</a></p>

<h4>Alaska Native Villages</h4>

<p><a href="/geospatial/guidance-using-tribal-boundaries-areas-and-names-resources">Boundary-centroid locations</a> based on records provided by the Bureau of Land Management and administered under the <a href="https://uscode.house.gov/view.xhtml?path=/prelim@title43/chapter33&amp;edition=prelim">Alaska Native Claims Settlement Act</a> (ANSCA).<br /><em>Source</em>: <a href="https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/BND___Alaska_Native_Villages/FeatureServer">EPA ArcGIS for Alaska Native Villages</a></p>

<h4>American Indian Reservations</h4>

<p><a href="https://tigerweb.geo.census.gov/tigerwebmain/TIGERweb_geography_details.html">Census Bureau-defined areas set aside by the federal government for use by tribes</a> in accordance with tribal treaties, agreements, executive orders, federal statutes, secretarial orders, and judicial determinations relevant to a given entity.<br /><em>Source</em>: <a href="https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/BND___American_Indian_Reservations/FeatureServer">EPA ArcGIS for American Indian Reservations</a></p>

<h4>American Indian Off-reservation Trust Lands</h4>

<p><a href="https://tigerweb.geo.census.gov/tigerwebmain/TIGERweb_geography_details.html">Census Bureau-defined areas for which the United States holds title in trust for the benefit of a tribe or for an individual American Indian</a>. Trust lands may be located on or off an American Indian Reservation, though the Census Bureau only tabulates data for Off-reservation trust lands with a specific federally recognized reservation and/or tribal government.<br /><em>Source</em>: <a href="https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/BND___American_Indian_Off_Reservation_Trust_Lands/FeatureServer">EPA ArcGIS for American Indian Off-reservation Trust Lands</a></p>

<h4>Oklahoma Tribal Statistical Areas (OTSA) Joint-Use Areas</h4>

<p>As applied to <a href="https://tigerweb.geo.census.gov/tigerwebmain/TIGERweb_geography_details.html">OTSAs by the Census Bureau</a>, include areas administered jointly and/or claimed by two or more American Indian tribes that have a delineated OTSA.<br /><em>Source</em>: <a href="https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/BND___Oklahoma_Statistical_Areas/FeatureServer">EPA ArcGIS for Oklahoma Statistical Areas</a></p>

<h4>Virginia Federally Recognized Tribes</h4>

<p>Contains point data for federally recognized tribes geographically located in the state of Virginia, corresponding with the administrative boundaries of EPA Region 3. These tribes are federally recognized, but do not currently have land that qualifies as Indian country. Locations are based on mailing addresses for each tribe provided by the EPA Region 3 Tribal Program Coordinator to the US EPA Office of Mission Support on May 5, 2021.<br /><em>Source</em>: <a href="https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/BND___Other_Federally_Recognized_Tribes/FeatureServer">EPA ArcGIS for Other Federally Recognized Tribes</a></p>

<h4>Tribal Cession Boundaries</h4>

<p><a href="https://memory.loc.gov/ammem/amlaw/lwss-ilc.html">U.S. Forest Service-defined boundaries</a> depicting lands ceded to the federal government for which they may still retain rights and may not be present-day tribal boundaries.<br /><em>Source</em>: <a href="https://apps.fs.usda.gov/arcx/rest/services/EDW/EDW_TribalCessionLands_01/MapServer/0">USDA ArcGIS for Indian Land Cessions in the United States</a></p>

<h4>Alaska Native Regional Corporations</h4>

<p><a href="https://www.census.gov/programs-surveys/geography/about/glossary/aian-definitions.html">Census Bureau-defined, corporate entities</a> organized to conduct both for-profit and non-profit affairs of Alaska Natives pursuant to the Alaska Native Claims Settlement Act. They have legally defined boundaries that subdivide all of Alaska into twelve regions (except for the area within the Annette Island Reserve).<br /><em>Source</em>: <a href="https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/AIANNHA/MapServer/0">Census ArcGIS for Alaska Native Regional Corporations</a></p>

<h4>State-recognized American Indian Reservations</h4>

<p>Census Bureau-curated boundaries that depict reservations established by certain state governments for tribes recognized by the state.<br /><em>Source</em>: <a href="https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/AIANNHA/MapServer/4">Census ArcGIS for State American Indian Reservations</a></p>

<h4>Hawaiian Native Home Lands</h4>

<p>Census Bureau-defined areas depicting the 75 Hawaiian homelands in the U.S. state of Hawaii in pursuant with the Hawaiian Homes Commission Act of 1920 (HHCA), as amended. <br /><em>Source</em>: <a href="https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/AIANNHA/MapServer/5">Census ArcGIS for Hawaiian Home Lands</a></p>

<h4>State-designated Tribal Statistical Areas</h4>

<p>Statistical geographic areas identified and delineated for state recognized tribes by the Census Bureau that are not federally recognized and do not have an American Indian reservation or off-reservation trust land.<br /><em>Source</em>: <a href="https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/AIANNHA/MapServer/8">Census ArcGIS for State Designated Tribal Statistical Areas</a></p>

<h3 id="prisons">Prisons</h3>

<p>The prison boundary feature class contains secure detention facilities. These facilities range in jurisdiction from federal (excluding military) to local governments. Polygon geometry is used to describe the extent of where the incarcerated population is located (fence lines or building footprints).<br /><em>Source:</em> <a href="https://hifld-geoplatform.opendata.arcgis.com/datasets/geoplatform::prison-boundaries/about">Department of Homeland Security</a></p>

<h3 id="public-housing">Public Housing</h3>

<p>This dataset provides the location, and resident characteristics of HUD administer public housing development buildings. Location data for HUD-related properties and facilities are derived from HUD's enterprise geocoding service.<br />
To learn more about Public Housing visit: <a href="https://www.hud.gov/program_offices/public_indian_housing/programs/ph/" target="_blank">U.S. Department of Housing and Urban Development</a><strong> </strong></p>

<h3 id="subsidized-public-housing">Subsidized Public Housing</h3>

<p>This layer represents the approximate locations of HUD’s Multifamily Housing. The locations of individual buildings associated with each property are not depicted here. HUD’s Multifamily Housing property portfolio consist primarily of rental housing properties with five or more dwelling units such as apartments or town houses, but can also include nursing homes, hospitals, elderly housing, mobile home parks, retirement service centers, and occasionally vacant land. The three largest assistance programs for Multifamily Housing are Section 8 Project Based Assistance, Section 202 Supportive Housing for the Elderly, and Section 811 Supportive Housing for Persons with Disabilities.  <br />
To learn more about Multifamily Housing visit: <a href="https://www.hud.gov/program_offices/housing/mfh" target="_blank">U.S. Department of Housing and Urban Development</a></p>

<h3 id="colonias">Colonias</h3>

<h4><strong>Colonias Communities (HUD)</strong></h4>

<p>This service denotes the locations of colonias communities as defined in Section 916 of the Cranston-Gonzalez National Affordable Housing Act of 1990.<br />
Per Section 916 of the Cranston-Gonzalez National Affordable Housing Act of 1990, a "colonia" refers to any community that meets the following criteria:<br /><strong>       (A)</strong> is in the State of Arizona, California, New Mexico, or Texas;<br /><strong>       (B)</strong> is in the area of the United States within 150 miles of the border between the United States and Mexico, except that the term does not include any standard metropolitan statistical area that has a population exceeding 1,000,000;<br /><strong>       (C)</strong> is designated by the State or county in which it is located as a colonia;<br /><strong>       (D)</strong> is determined to be a colonia on the basis of objective criteria, including lack of potable  water supply, lack of adequate sewage systems, and lack of decent, safe, and sanitary housing, and;<br /><strong>       (E)</strong> was in existence and generally recognized as a colonia before the date of the enactment of the Cranston-Gonzalez National Affordable Housing Act.<br />
Source: <a href="https://hudgis-hud.opendata.arcgis.com/datasets/HUD::colonias-communities/about">U.S. Department of Housing and Urban Development’s (HUD) colonias geospatial data</a></p>

<h4>TX State Colonias</h4>

<p>Colonias are substandard housing developments, often found along the Texas-Mexico border, where residents lack basic services such as drinking water, sewage treatment, and paved roads.<br />
or<br />
Typically, a residential area lacking some basic infrastructure like a drinking water supply, sewage treatment, paved roads, adequate drainage, etc. "Colonia" is a Spanish word for neighborhood.<br /><em>Source:</em> <a href="https://www.texasattorneygeneral.gov/divisions/colonias">Texas Attorney General’s (TX-AG) colonias geospatial database</a> </p>

<h4><strong>NM State Colonias</strong></h4>

<p>University of Mexico’s Bureau of Business &amp; Economic Research (BBER) has developed an innovative technique for approximating colonia geographies and tabulating data that is representative of those communities. Using this technique, BBER tabulated 2010 Census data and American Community Survey (ACS) 2006-2010 5-Year Estimates for areas that approximate the geographic extent of various New Mexico colonias under a contract with the New Mexico Mortgage Finance Authority (MFA).<br /><em>Source: </em><a href="https://bber.unm.edu/data/colonias/">University of New Mexico’s Bureau of Business and Economic Research’s (BBER) colonias geospatial database</a></p>

<h3 id="justice40">Justice40/IRA</h3>

<h4><strong>Justice 40</strong></h4>

<p>This layer built by Esri assesses and identifies communities that are disadvantaged according to <a href="https://screeningtool.geoplatform.gov/en/methodology">Justice40 Initiative criteria</a>. Details of the assessment are provided in the popup for every census tract in the United States and its territories American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the U.S. Virgin Islands. This map uses 2010 census tracts from Version 0.1 of the <a href="https://screeningtool.geoplatform.gov/en/methodology">source data</a> downloaded November 22, 2022. </p>

<h4>EPA IRA Disadvantaged Communities</h4>

<p>The EPA <a href="/inflation-reduction-act">Inflation Reduction Act (IRA)</a> Disadvantaged Communities map combines multiple datasets that individually can be used to determine whether a community is disadvantaged for the purposes of implementing programs under the IRA. All data sets are assigned values at the Census block group level. The criteria and associated datasets used in the map are:</p>

<ul><li>Any census tract that is included as disadvantaged in CEJST</li>
	<li>Any census block group at or above the 90th%ile for any of EJScreen’s Supplemental Indexes when compared to the nation or state,</li>
	<li>and/or any geographic area within Tribal lands, as included in EJScreen
	<ul><li>Alaska Native Allotments</li>
		<li>Alaska Native Villages</li>
		<li>American Indian Reservations</li>
		<li>American Indian Off-reservation Trust Lands</li>
		<li>Oklahoma Tribal Statistical Areas</li>
	</ul></li>
</ul><p><em>Source: </em><a href="/environmentaljustice/inflation-reduction-act-disadvantaged-communities-map">EPA's IRA Disadvantaged Communities Map</a></p>

<hr /><h2 id="boun">Boundaries</h2>

<h4><strong>Zip Codes</strong></h4>

<p>The Zip Codes layer provides information and identifies each postal delivery area in the United States.<br /><em>Source: </em><a href="https://www.arcgis.com/home/group.html?content=all&amp;id=24838c2d95e14dd18c25e9bad55a7f82#overview">Data and Maps for ArcGIS</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=0&amp;service=NEPAssist/Boundaries">Zip Codes</a></p>

<h4><strong>Congressional Districts</strong></h4>

<p>The Congressional Districts layer includes information on the 118th Congressional Districts of the United States, and U.S. Territories.<br /><em>Source:</em> <a href="https://www.arcgis.com/home/item.html?id=9ffc6dc695374b169eadb5f1f6149c2a">ArcGIS Map Service</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=1&amp;service=NEPAssist/Boundaries">Congressional Districts</a></p>

<h4><strong>City Boundaries</strong></h4>

<p>The City Boundaries layer includes incorporated cities and Census Designated Places from the U.S. Census Bureau TIGER/Line data.<br /><em>Source:</em> <a href="https://www.census.gov/geographies/mapping-files/time-series/geo/tiger-geodatabase-file.2019.html">U.S. Census Bureau</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=2&amp;service=NEPAssist/Boundaries">City Boundaries</a></p>

<h4><strong>Urbanized Areas</strong></h4>

<p>Urbanized Areas are derived from the 2019 U.S. Census Bureau TIGER/Line Urban Areas. Urbanized Areas are contiguous areas of populations greater than 50,000.<br /><em>Source:</em> <a href="https://www.census.gov/geographies/mapping-files/time-series/geo/cartographic-boundary.html">U.S. Census Bureau</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=3&amp;service=NEPAssist/Boundaries">Urbanized Areas</a></p>

<h4><strong>Federal Lands</strong></h4>

<p>The Federal Lands layer includes information on lands owned or administered by the Federal government. This layer is downloaded from the U.S. Geological Survey (USGS).<br /><em>Source:</em> <a href="https://www.usgs.gov/core-science-systems/national-geospatial-program/small-scale-data">USGS National Geospatial Program Small-Scale Data</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=4&amp;service=NEPAssist/Boundaries">Federal Lands</a></p>

<h4><strong>Townships Boundary</strong></h4>

<p>The Townships Boundary layer portrays the Public Land Survey System (PLSS) boundaries of the United States to the township level. This layer is downloaded from the Bureau of Land Management (BLM) PLSS Map Service.<br /><em>Source:</em> <a href="https://hub.arcgis.com/datasets/958f943fa7bc4b1199d49f1eb69612da_1">Bureau of Land Management PLSS Townships</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=5&amp;service=NEPAssist/Boundaries">Townships Boundary</a></p>

<h4><strong>Counties</strong></h4>

<p>The Counties layer portrays the county boundaries of the United States.<br /><em>Source:</em> <a href="https://www.census.gov/geographies/mapping-files/time-series/geo/cartographic-boundary.html">U.S. Census Bureau</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=6&amp;service=NEPAssist/Boundaries">Counties</a></p>

<h4><strong>States</strong></h4>

<p>The State layer provides state boundaries of the United States.<br /><em>Source:</em> <a href="https://www.census.gov/geographies/mapping-files/time-series/geo/cartographic-boundary.html">U.S. Census Bureau</a><br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=7&amp;service=NEPAssist/Boundaries">States</a></p>

<h4><strong>EPA Regions</strong></h4>

<p>The EPA Regions layer includes EPA Administrative Region boundaries derived from State boundaries.<br /><em>Source:</em> EPA Office of Environmental Information (OEI)<br /><em>Spatial Metadata:</em> <a href="https://nepassisttool.epa.gov/nepassist/metadata_soe.aspx?lyrIndex=8&amp;service=NEPAssist/Boundaries">EPA Regions</a> <strong> </strong></p>



  
  
  
  

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